Miley Cyrus has a bold message for all the naysayers: "Don't hate. Appreciate." The former Disney star posted a silly shot of herself wearing a Chanel-brand onesie on Twitter on Wednesday in a bold fashion statement.

But despite her childish outfit, the button-pushing singer, 20, has been growing up and determinedly pushing back against her wide-eyed Hannah Montana image in recent months.

Just last week, the "Party in the U.S.A." singer released her latest collaboration, with rapper Snoop Lion, called "Ashtrays and Heartbreaks." The lyrics for the reggae-tinged track are a huge departure from Cyrus' previous works of mild teenage rebellion.

"Now my buzz is gone, and I need to re-up on reality/ Can't let them see me weak I need to pause on it/ Is there any possibility that everyone feels like me?" she sings on the single.

On April 5, the singer (engaged to fiancé Liam Hemsworth) joined pal Pharrell Williams for his 40th birthday celebration in Miami, wearing baggy black shorts and a tight black crop-top that showed off her toned midriff.

"So many peeps I love birthdays are today!" she tweeted on Friday. "Gotta celebrate."